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| author | Janosch Frank <frankja@linux.vnet.ibm.com> | 2018-02-15 16:33:47 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2018-05-17 09:00:41 +0200 |
| commit | 55531b7431db789766ac952391e95c170db48581 (patch) | |
| tree | 8e1a5fb6985cfb7faf1e2a61c1a4681488513dea /arch/s390/mm | |
| parent | 75bc37fefc4471e718ba8e651aa74673d4e0a9eb (diff) | |
| download | linux-stable-55531b7431db789766ac952391e95c170db48581.tar.gz linux-stable-55531b7431db789766ac952391e95c170db48581.tar.bz2 linux-stable-55531b7431db789766ac952391e95c170db48581.zip | |
KVM: s390: Add storage key facility interpretation control
Up to now we always expected to have the storage key facility
available for our (non-VSIE) KVM guests. For huge page support, we
need to be able to disable it, so let's introduce that now.
We add the use_skf variable to manage KVM storage key facility
usage. Also we rename use_skey in the mm context struct to uses_skeys
to make it more clear that it is an indication that the vm actively
uses storage keys.
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/gmap.c | 6 | ||||
| -rw-r--r-- | arch/s390/mm/pgtable.c | 4 |
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 2c55a2b9d6c6..bc56ec8abcf7 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -2184,14 +2184,14 @@ int s390_enable_skey(void) int rc = 0; down_write(&mm->mmap_sem); - if (mm_use_skey(mm)) + if (mm_uses_skeys(mm)) goto out_up; - mm->context.use_skey = 1; + mm->context.uses_skeys = 1; for (vma = mm->mmap; vma; vma = vma->vm_next) { if (ksm_madvise(vma, vma->vm_start, vma->vm_end, MADV_UNMERGEABLE, &vma->vm_flags)) { - mm->context.use_skey = 0; + mm->context.uses_skeys = 0; rc = -ENOMEM; goto out_up; } diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 4f2b65d01a70..301e466e4263 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -158,7 +158,7 @@ static inline pgste_t pgste_update_all(pte_t pte, pgste_t pgste, #ifdef CONFIG_PGSTE unsigned long address, bits, skey; - if (!mm_use_skey(mm) || pte_val(pte) & _PAGE_INVALID) + if (!mm_uses_skeys(mm) || pte_val(pte) & _PAGE_INVALID) return pgste; address = pte_val(pte) & PAGE_MASK; skey = (unsigned long) page_get_storage_key(address); @@ -180,7 +180,7 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry, unsigned long address; unsigned long nkey; - if (!mm_use_skey(mm) || pte_val(entry) & _PAGE_INVALID) + if (!mm_uses_skeys(mm) || pte_val(entry) & _PAGE_INVALID) return; VM_BUG_ON(!(pte_val(*ptep) & _PAGE_INVALID)); address = pte_val(entry) & PAGE_MASK; |